drm/msm/a4xx: add adreno a405 support

It adds support for adreno a405 found on MSM8939.  The adreno_is_a430()
check in adreno_submit() needs an extension to cover a405.  The
downstream driver suggests it should cover the whole a4xx generation.
That's why it gets changed to adreno_is_a4xx(), while a420 is not
tested though.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>

drivers/gpu/drm/msm/adreno/a4xx_gpu.c

@@ -66,19 +66,22 @@ static void a4xx_enable_hwcg(struct msm_gpu *gpu)
 		}
 	}
 
-	for (i = 0; i < 4; i++) {
-		gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL_MARB_CCU(i),
-				0x00000922);
-	}
+	/* No CCU for A405 */
+	if (!adreno_is_a405(adreno_gpu)) {
+		for (i = 0; i < 4; i++) {
+			gpu_write(gpu, REG_A4XX_RBBM_CLOCK_CTL_MARB_CCU(i),
+					0x00000922);
+		}
 
-	for (i = 0; i < 4; i++) {
-		gpu_write(gpu, REG_A4XX_RBBM_CLOCK_HYST_RB_MARB_CCU(i),
-				0x00000000);
-	}
+		for (i = 0; i < 4; i++) {
+			gpu_write(gpu, REG_A4XX_RBBM_CLOCK_HYST_RB_MARB_CCU(i),
+					0x00000000);
+		}
 
-	for (i = 0; i < 4; i++) {
-		gpu_write(gpu, REG_A4XX_RBBM_CLOCK_DELAY_RB_MARB_CCU_L1(i),
-				0x00000001);
+		for (i = 0; i < 4; i++) {
+			gpu_write(gpu, REG_A4XX_RBBM_CLOCK_DELAY_RB_MARB_CCU_L1(i),
+					0x00000001);
+		}
 	}
 
 	gpu_write(gpu, REG_A4XX_RBBM_CLOCK_MODE_GPC, 0x02222222);
@@ -137,7 +140,9 @@ static int a4xx_hw_init(struct msm_gpu *gpu)
 	uint32_t *ptr, len;
 	int i, ret;
 
-	if (adreno_is_a420(adreno_gpu)) {
+	if (adreno_is_a405(adreno_gpu)) {
+		gpu_write(gpu, REG_A4XX_VBIF_ROUND_ROBIN_QOS_ARB, 0x00000003);
+	} else if (adreno_is_a420(adreno_gpu)) {
 		gpu_write(gpu, REG_A4XX_VBIF_ABIT_SORT, 0x0001001F);
 		gpu_write(gpu, REG_A4XX_VBIF_ABIT_SORT_CONF, 0x000000A4);
 		gpu_write(gpu, REG_A4XX_VBIF_GATE_OFF_WRREQ_EN, 0x00000001);

drivers/gpu/drm/msm/adreno/adreno_device.c

@@ -92,6 +92,17 @@ static const struct adreno_info gpulist[] = {
 		.gmem  = SZ_1M,
 		.inactive_period = DRM_MSM_INACTIVE_PERIOD,
 		.init  = a3xx_gpu_init,
+	}, {
+		.rev   = ADRENO_REV(4, 0, 5, ANY_ID),
+		.revn  = 405,
+		.name  = "A405",
+		.fw = {
+			[ADRENO_FW_PM4] = "a420_pm4.fw",
+			[ADRENO_FW_PFP] = "a420_pfp.fw",
+		},
+		.gmem  = SZ_256K,
+		.inactive_period = DRM_MSM_INACTIVE_PERIOD,
+		.init  = a4xx_gpu_init,
 	}, {
 		.rev   = ADRENO_REV(4, 2, 0, ANY_ID),
 		.revn  = 420,

drivers/gpu/drm/msm/adreno/adreno_gpu.c

@@ -459,7 +459,7 @@ void adreno_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit,
 				break;
 			/* fall-thru */
 		case MSM_SUBMIT_CMD_BUF:
-			OUT_PKT3(ring, adreno_is_a430(adreno_gpu) ?
+			OUT_PKT3(ring, adreno_is_a4xx(adreno_gpu) ?
 				CP_INDIRECT_BUFFER_PFE : CP_INDIRECT_BUFFER_PFD, 2);
 			OUT_RING(ring, lower_32_bits(submit->cmd[i].iova));
 			OUT_RING(ring, submit->cmd[i].size);

drivers/gpu/drm/msm/adreno/adreno_gpu.h

@@ -202,6 +202,11 @@ static inline bool adreno_is_a4xx(struct adreno_gpu *gpu)
 	return (gpu->revn >= 400) && (gpu->revn < 500);
 }
 
+static inline int adreno_is_a405(struct adreno_gpu *gpu)
+{
+	return gpu->revn == 405;
+}
+
 static inline int adreno_is_a420(struct adreno_gpu *gpu)
 {
 	return gpu->revn == 420;